Sacrificial water corrosion-resistant epoxy paint composition

Abstract

A sacrificial anticorrosion water epoxy paint composition contains water-dispersive basic epoxy resin, multi-metal alloy powder, water-soluble solidifying agent prepared from polyamine and polyol, and rheologic nano assistant. Its advantages are high stability, excellent anticorrosion and mechanical performance of its film, and no release of harmful gas.

Description

technical field [0001] Coatings, adhesives and polymer additives. technical background [0002] There are many ways to protect base metals (such as ships, bridges, aircraft and building components) from corrosion. Among them, coating anti-corrosion is widely used because of its simple construction, economical applicability, freedom from equipment area and shape, and certain decorative effects. Applications. At present, most of the coatings used in industry are solvent-based coatings, especially epoxy primers, most of which use xylene and n-butanol as solvents. These solvents have varying degrees of toxicity. When they volatilize, they not only cause environmental pollution, but also seriously endanger construction. the health of personnel. With the enhancement of people's awareness of environmental protection, new anti-corrosion coatings that do not contain organic solvents or low volatile organic compounds (low VOC) have been developed one after ...

AI Technical Summary

Problems solved by technology

However, because the ether bond generated by the esterification reaction will be hydrolyzed with time, the system will be unstable and phase separation will easily occur; Chinese patent CN1031550A mainly uses epoxy resin and acrylic monomer to react, and then the reaction product is mixed with vinyl monomer For example, styrene is copolymerized to make a good water-based coating, but its fatal disadvantage is poor corrosion resistance.